DISPOSITIVO PER LA SEPARAZIONE DI IMPURITA' METALLICHE DA UN CONDOTTO DI TRASPORTO DELLE FIBRE NELLA PREPARAZIONE ALLA FILATURA

摘要

A system for removing foreign metal bodies from a pneumatically conveyed stream of fiber material includes a fiber conveying duct in which the fiber material is pneumatically advanced; a branch-off location in the duct; a branch conduit joining the duct at the branch-off location; a metal detector for ascertaining the presence of a foreign metal body in the stream of fiber material at a sensing location upstream of the branch-off location; a channelling device arranged in the branch-off location for selectively directing the fiber stream into the branch conduit or, respectively, causing the fiber stream to continue travel in the duct past the branch-off location; a control device operatively connected to the metal detector and the channelling device for moving the channelling device into a removal position upon ascertaining the passage of a foreign metal body by the detector; and at least one bend in the duct for changing the direction of travel of fiber material in the duct. The bend is situated between the branch-off location and the sensing location.